R

a

b

c

d

a^2+b^2+c^2+d^2=4R^2

A = (2.06, 0.6)
B = (4.92, 3.42)
circle = Circle(A, B)
C = Intersect(xAxis, yAxis)
D = Point(circle)
E = Intersect(circle, yAxis, 1)
F = Intersect(circle, xAxis, 2)
G = Intersect(circle, yAxis, 2)
a = Segment(C, F)
b = Segment(C, G)
c = Segment(C, D)
d = Segment(C, E)
R = Segment(A, B)
α = Angle(E, C, F)